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Rev Age Author Path Log message Diff
4055 5772 d 7 h trochtova /branches/dd/ changes in trunk (rev 4054) merged into dd branch  
3022 6055 d 9 h decky /branches/dd/ device drivers branch  
2141 6483 d 21 h jermar /trunk/ The Ultimate Solution To Illegal Virtual Aliases.
It is better to avoid them completely than to fight them.
Switch the sparc64 port to 16K pages. The TLBs and TSBs
continue to operate with 8K pages only. Page tables and
other generic parts operate with 16K pages.

Because the MMU doesn't support 16K directly, each 16K
page is emulated by a pair of 8K pages. With 16K pages,
illegal aliases cannot be created in 16K D-cache.		  
2134 6485 d 1 h jermar /trunk/kernel/ Reworked handling of illegal virtual aliases caused by frame reuse.
We moved the incomplete handling from backend's frame method to
backend's page_fault method. The page_fault method is the one that
can create an illegal alias if it writes the userspace frame using
kernel address with a different page color than the page to which is
this frame mapped in userspace. When we detect this, we do D-cache
shootdown on all processors (!!!).

If we add code that accesses userspace memory from kernel address
space, we will have to check for illegal virtual aliases at all such
places.

I tested this on a 4-way simulated E6500 and a real-world Ultra 5,
which has unfortunatelly only one processor.

This solves ticket #26.		  
2089 6542 d 7 h decky /trunk/ huge type system cleanup
remove cyclical type dependencies across multiple header files
many minor coding style fixes		  
2079 6549 d 1 h decky /trunk/kernel/ remove some typedefs in favor of anonymous structures  
2071 6553 d 0 h jermar /trunk/ (c) versus (C)  
2046 6587 d 1 h jermar /trunk/kernel/arch/sparc64/include/ Another comment fix.  
2045 6587 d 1 h jermar /trunk/kernel/arch/sparc64/include/ Fix comment.  
2044 6587 d 2 h jermar /trunk/kernel/arch/sparc64/ On sparc64's tick interrupt, adjust the TICK_COMPARE register instead of the TICK
register. The TICK register now increments linearily and can be used by the get_cycle()
function.		  
2038 6587 d 21 h jermar /trunk/kernel/arch/sparc64/ Remove old stuff.  
2009 6596 d 23 h jermar /trunk/kernel/ Initial support for handling illegal virtual aliases on sparc64.  
1903 6665 d 0 h jermar /trunk/ SMP stuff for sparc64.
Almost complete except for IPIs.
The absence of IPI support deadlocks
the kernel when more CPUs are configured.		  
1881 6680 d 7 h jermar /trunk/ sparc64 work:
- find a CPU node and read its clock_frequency attribute
- implement asm_delay_loop()
- set TICK_COMPARE register according to processor frequency
- small improvements at random places

OpenFirmware work:
- two new functions for walking the device tree

Generic boot loader work:
- added basic string functions

Usual pile of indentation and formatting fixes.		  
1860 6692 d 1 h jermar /trunk/kernel/ A lot of untested sparc64 stuff:
- Write ASID to hardware when a thread is about to run in userspace.
- Add userspace() and switch_to_userspace() functions.
- Handle special cases when the userspace spill/fill handler causes MMU trap.
- Resolve some TODOs in the existing sparc64 code.
- sparc64 has now C99 compliant header guards.
- Formatting and indentation fixes.		  
1787 6743 d 2 h decky / move kernel/trunk, uspace/trunk and boot/trunk to trunk/kernel, trunk/uspace and trunk/boot  
1731 6766 d 20 h jermar /kernel/trunk/ Updates in Doxygen-style comments.
Make architecture specific modules appear conditionally in the documentation.
Add time management module.
Improve names of other modules and sort module order
to be more like in the design documentation.		  
1702 6771 d 6 h cejka /kernel/trunk/ Kernel doxygen comments updated.  
640 6948 d 21 h jermar /kernel/trunk/ sparc64 work.
CPU identification.		  
534 6962 d 1 h jermar / Rename HelenOS/SPARTAN to HelenOS/kernel again.  

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